Grate for refuse-burners



UNITED STATES PATENT OFFICE.

GRATE FOR REFUSE-BU RN ERS.`

SPECIFICATION forming part of Letters Patent No.4 410,104, dated August2'7, 1889.

Application filed September 22, 1888. l Serial No. 2861064. (No model.)

To @ZZ whom t may concern:

Be it known that I, PHILIP KEENE, a citizen ofthe United States,residing at Moline,

in the county of Rock Island and State of Illinois, have inventedcertain new and useful Improvements in Grates for Refuse-Burners ofSaw-Mills, of which the following' is a specication.

My invention relates to improvements in that class of burners orapparatus for getting rid of the sawdust, railings, and waste fromsaw-mills by combustion, known as refuseburners,` usually consisting ofa tall vertical cylinder, of iron or brick, a grate near its bottom, anash-pit beneath the grate-bars, and suitable draft-holes.

It consists in a novel method of arranging the grate-bars to provide forthe expansion and contraction thereof under varying degrees of heat,avoiding their liability to twist or bend out of shape, and consequentlyrendering the grate more durable, more easily to be replaced whennecessary and more eifective in use.

Refuse-burners of the class above mentioned are constructed with anash-pit either partially or wholly below the surface of the A ground,draft-holes slightly above the surface and below the grate-bars, andlike draft-holes above such grate-bars. They are made cylindrical inform and extend a considerable distance upward-say a hundred or morefeet, this great height affording a powerful draft. In the side of thiscylinder at some distancefrom the grate is a hole or chute for supplyingthe Waste materials thereto. In the burners heretofore constructed thegrate is composed of sections, the form most commonly adopted beingsegments resting upon a central support and supports upon the wall withsuitable center supports; or the segments may be divided in their lengthinto two or more sections, and there are no means provided for theirexpansion or contraction under different degrees of heat. By myimprovement this defect is remedied and a burner provided which is atonce simple, durable, and inexpensive.

In the drawings, Figure l is a plan view of my improved grate, showingthe method of displaying my grate-bars. Fig. 2 is a det-ail of one of mygrate-bar standards, and Fig. 3 is adetail of one of 4my grate-bar restsor supports.

Arepresents the inner surface of the cylindrical wall of the burner.

B B B B B B are y independent grate-sections,

in this case the six combined forming the complet-e grate. i

C is one of my grate-standards; D, a gratebar rest or support, and E oneof my gratebars.

It will be noticed that I arrange my bars in groups;in this case siX`tWosquares and four parallelograms; but Ido not limit myself to thisprecise number nor to the shapes shown and described herein. Further, Ido not limit the adaptability of my invention to the peculiarconstruction of burner here described, as I think it will proveeffective when used in connection with any other construction. However,for convenience, I will de.- scribe my improvements as embodied in aburner such as above mentioned, and as displayed in a grate containingsix groups or sections of grate-bars of the shapes shown in Fig. 1.

From the bottom of the ashepit, preferably upon brick or otherfoundation pillars, are placed the standards C, constructed withvertical lugs c. These standards are so arranged that when the grate-barrests D are slipped on the lugs c thereon the figures inclosed by suolirests connecting the four standards of each group will present for theentire grate two sq uares and four parallelograms. For afurther supportto the rests and the bars thereon I place'an additional standard cimmediately between the end standards. The grate-bar rests or supports Dare preferably constructed, as shown, with a central slot CZ, runningsubstantially from end to end, and the ends of such slot are placed overthe lugs c on the standards, the body of the metal on the support beyondsuch slot preventing their longitudinal displacement when once adjusted.The grate-bars are displaced at right angles to the grate-support, andare held upon such supports by gravity simply, no other attachment beingnecessary. this arrangement the grate-bars in each gro up have anability to expand and contract inde- It is obvious that byv IOOpendently of the bars in any other group. Their capacity in thisdirection is not limited by the expansion or contraction of those of anyother group. Y The expansion longitudinally of the bars of any group isat an angle to the bars of its opposing groups, and affords ample roomto allow of such expansibilitywithout crowding such opposing bars, andat the same time requiring no appreciable vacant space to be leftbetween the ends of the bars to provide for such expansion, and by these:means preventing the liability or possibility of any bending or warpingof the bars by their ends coming in contact in the process of expansion.`Again, by the use of single barsV running the entire Width of the f urn ace-grate, or sections, segmental or otherwise, composed of severalbars, greater strength :is secured, less liability to break or warp isobtained, and facility to handle in constructing a burner or removing abar is accomplished.

l. In a refuse-burncr for saw-mills, a grate composed ofindependentlysmovable bars arranged in groups, the bars in each groupbeing at an angle to those in adjacent groups.

2. In a refuse-burner for saw-mills, a grate composed ofindependently-movable gratebars" arranged in groups, the bars forming agroup being disposed in the same direction and each group being disposedat an angle to an adjacent group.

3. In a refuse-burner forsaW-mills, the grate composed of independentgrate-sections B B B B B B, each section formed by severalindependently-movable bars, and displayed as herein described.-

4. The combination, in a refuse-burner for saw-mil1s,of the gratecomposed of several independent sections formed by groups of singlegrate-bars E, the grate-standards C, and the grate-supports D, allconstructed and arranged as herein set forth.

PHILIP KEENE.

'itnesses:

JOHN R. BLAKEMORE, WILL. B. KEENE.

